How to add custom QGraphicsItem to QGraphicsGridLayout?

[qutron]

I'm trying to add my custom created QGraphicsItem to QGraphicsGridLayout.
QGraphicsGridLayout->addItem requires QGraphicsLayoutItem as argument.
How to implement conversion from QGraphicsItem to QGraphicsLayoutItem?

[JohannesMunk]

The solution is multiple inheritance:

class YourItem : public QGraphicsItem, public QGraphicsLayoutItem
{
  ..
protected:
   virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF & constraint = QSizeF()) const;
   virtual void setGeometry(const QRectF & rect);
};

class YourItem : public QGraphicsItem, public QGraphicsLayoutItem
{
  ..
protected:
   virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF & constraint = QSizeF()) const;
   virtual void setGeometry(const QRectF & rect);
};

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HIH

Joh